單項(xiàng)選擇題A tonnage tax is levied according to the（）.

A.deadweight cargo tonnage aboard
B.displacement tonnage of vessel
C.gross tonnage of vessel
D.net tonnage of vessel


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1.單項(xiàng)選擇題A crew member reports that the high-pressure alarm light of a low-pressure CO2 fixed fire extinguishing system is illuminated. The most probable cause of this condition would be that（）.

A.an air leak has developed in the tank
B.the tank cooling system has malfunctioned
C.the pilot cylinder discharge valve is leaking
D.an excessive amount of insulation has been installed on the tank and piping

2.單項(xiàng)選擇題A crew member is having an epileptic convulsion. You should（）.

A.give the victim artificial respiration
B.completely restrain the victim
C.give the victim one 30 mg tablet of phenobarbital
D.keep the victim from injuring him or herself

3.單項(xiàng)選擇題A crew member has suffered frostbite to the toes of the right foot. Which is NOT an acceptable first aid measure?（）

A.Rub the toes briskly
B.Elevate the foot slightly
C.Rewarm rapidly
D.Give aspirin or other medication for pain if necessary

4.單項(xiàng)選擇題A continuous watertight bulkhead on a ship is normally also a(n)（）.

A.structural bulkhead
B.exterior bulkhead
C.centerline bulkhead
D.joiner bulkhead

5.單項(xiàng)選擇題A continual worsening of the list or trim of any floating ship indicates（）.

A.negative GM
B.progressive flooding
C.structural failure
D.an immediate need to counterflood